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Community structure and seasonal dynamics of diatom biofilms and associated grazers in intertidal mudflats

(2007) AQUATIC MICROBIAL ECOLOGY. 47(3). p.253-266
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Abstract
The composition and seasonal dynamics of biofilm-associated eukaryotic communities were analysed at the metre and kilometre scale along a salinity gradient in the Westerschelde estuary (The Netherlands), using microscopy and a genetic fingerprinting technique (PCR-DGGE). Microphytobenthic biomass, measured as chlorophyll a (chl a), varied seasonally over 2 orders of magnitude, being highest in spring. Communities were dominated by epipelic diatoms, in particular by members of the genus Navicula. In spring, a few smaller epipelic diatom species dominated during biomass peaks, while during the rest of the year, communities were more diverse and were characterised by larger species. The microphytobenthic community collapsed when grazers appeared, which happened concomitantly with a rise in temperature. Spring biomass development was associated with marked changes in porewater nutrient concentrations, especially towards the estuary mouth. In the DGGE data, diatoms, ciliates, amoebae, copepods, nematodes, annelids and platyhelminthes were detected. Ordination analysis of the species counts and DGGE data were largely congruent and indicated that on the scale of the whole estuary (i.e. km scale), taxonomic turnover in microphytobenthos composition was mainly associated with the salinity gradient. At smaller spatial scales, the position of sampling localities along the tidal exposure gradient appeared to be the main determinant of species turnover, in particular in the brackish reaches of the estuary.
Keywords
RIBOSOMAL-RNA, BENTHIC MICROALGAE, AMINO-ACIDS, FRESH-WATER, MUD SNAILS, DIVERSITY, NETHERLANDS, epipelic diatoms, eukaryotes, intertidal mudflat, salinity gradient, seasonal dynamics, MICROPHYTOBENTHIC BIOMASS, SCHELDT ESTUARY, WESTERSCHELDE ESTUARY

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Citation

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MLA
Sahan, Emel et al. “Community Structure and Seasonal Dynamics of Diatom Biofilms and Associated Grazers in Intertidal Mudflats.” AQUATIC MICROBIAL ECOLOGY 47.3 (2007): 253–266. Print.
APA
Sahan, E., Sabbe, K., Creach, V., Hernandez-Raquet, G., Vyverman, W., Stal, L. J., & Muyzer, G. (2007). Community structure and seasonal dynamics of diatom biofilms and associated grazers in intertidal mudflats. AQUATIC MICROBIAL ECOLOGY, 47(3), 253–266.
Chicago author-date
Sahan, Emel, Koen Sabbe, Veronique Creach, Guillermina Hernandez-Raquet, Wim Vyverman, Lucas J. Stal, and Gerard Muyzer. 2007. “Community Structure and Seasonal Dynamics of Diatom Biofilms and Associated Grazers in Intertidal Mudflats.” Aquatic Microbial Ecology 47 (3): 253–266.
Chicago author-date (all authors)
Sahan, Emel, Koen Sabbe, Veronique Creach, Guillermina Hernandez-Raquet, Wim Vyverman, Lucas J. Stal, and Gerard Muyzer. 2007. “Community Structure and Seasonal Dynamics of Diatom Biofilms and Associated Grazers in Intertidal Mudflats.” Aquatic Microbial Ecology 47 (3): 253–266.
Vancouver
1.
Sahan E, Sabbe K, Creach V, Hernandez-Raquet G, Vyverman W, Stal LJ, et al. Community structure and seasonal dynamics of diatom biofilms and associated grazers in intertidal mudflats. AQUATIC MICROBIAL ECOLOGY. 2007;47(3):253–66.
IEEE
[1]
E. Sahan et al., “Community structure and seasonal dynamics of diatom biofilms and associated grazers in intertidal mudflats,” AQUATIC MICROBIAL ECOLOGY, vol. 47, no. 3, pp. 253–266, 2007.
@article{743412,
  abstract     = {The composition and seasonal dynamics of biofilm-associated eukaryotic communities were analysed at the metre and kilometre scale along a salinity gradient in the Westerschelde estuary (The Netherlands), using microscopy and a genetic fingerprinting technique (PCR-DGGE). Microphytobenthic biomass, measured as chlorophyll a (chl a), varied seasonally over 2 orders of magnitude, being highest in spring. Communities were dominated by epipelic diatoms, in particular by members of the genus Navicula. In spring, a few smaller epipelic diatom species dominated during biomass peaks, while during the rest of the year, communities were more diverse and were characterised by larger species. The microphytobenthic community collapsed when grazers appeared, which happened concomitantly with a rise in temperature. Spring biomass development was associated with marked changes in porewater nutrient concentrations, especially towards the estuary mouth. In the DGGE data, diatoms, ciliates, amoebae, copepods, nematodes, annelids and platyhelminthes were detected. Ordination analysis of the species counts and DGGE data were largely congruent and indicated that on the scale of the whole estuary (i.e. km scale), taxonomic turnover in microphytobenthos composition was mainly associated with the salinity gradient. At smaller spatial scales, the position of sampling localities along the tidal exposure gradient appeared to be the main determinant of species turnover, in particular in the brackish reaches of the estuary.},
  author       = {Sahan, Emel and Sabbe, Koen and Creach, Veronique and Hernandez-Raquet, Guillermina and Vyverman, Wim and Stal, Lucas J. and Muyzer, Gerard},
  issn         = {0948-3055},
  journal      = {AQUATIC MICROBIAL ECOLOGY},
  keywords     = {RIBOSOMAL-RNA,BENTHIC MICROALGAE,AMINO-ACIDS,FRESH-WATER,MUD SNAILS,DIVERSITY,NETHERLANDS,epipelic diatoms,eukaryotes,intertidal mudflat,salinity gradient,seasonal dynamics,MICROPHYTOBENTHIC BIOMASS,SCHELDT ESTUARY,WESTERSCHELDE ESTUARY},
  language     = {eng},
  number       = {3},
  pages        = {253--266},
  title        = {Community structure and seasonal dynamics of diatom biofilms and associated grazers in intertidal mudflats},
  volume       = {47},
  year         = {2007},
}

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